Driving-gear of motor-boats.



No. 833,769. PATENTED OCT. 23,1906.

, H. G. BRASIBR.

DRIVING GEAR UP MOTOR BOATS. APPLICATION FILED MAR.16, 1906.

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UNITED STATES PATENT OFFICE.

HENRI CHARLES BRASIER, OF IVRY-PORT, FRANCE.

DRIVING-GEAR OF MOTOR-BOATS.

Specification of Letters Patent.

Patented Oct. 23, 1906.

' Application filed March 15, 1906 Serial No. 306,230.

motor-boats, and is designed to provide an arrangement which shallpermit of obtaining the maximum amount of unoccupied space in the bow ofthe boat and of carrying back I the weight of the motor to the stern,and it permits also of driving at a convenient speed a screw of adiameter appropriate to a hull determined'by a motor of any speedwhatever.

The invention will be fully described with reference to the accompanyingdrawings, in which one form of the invention is shown diagrammatically.

Figure 1 is a diagrammatic longitudinal section of a boat provided withthe driving-gear Figs. 2, 3, 4, and 5 modified forms of drivingear.

As shown in Fig. 1, the motor a is placed in the stern of the boat, andin front of it is provided a change-speed-gear device I), attached, bymeans of a universal joint 0, to a longitudinal shaft (1. This shaftrests in antifriction or ball bearings in a support or bracket 6 andcarries near its end a toothed wheel f. This wheel f gears with anothertoothed wheel g, preferably of greater diameter mounted on a shaft h,arallel to the shaft d and supported in a simi ar manner in a support orbracket 6.

This shaft h is connected by a universal joint 0 with the shaft 3' ofthe screw k. It will be readily seen that by this arrangement anydesired proportion can be given to the diameters of the gear-wheels fand 9, so as to rotate the screw is at the speed desired according toits diameter, which depends on the dimensions of the boat and on thespeed of the motor a, also that this arrangement permits of placing theweight of the motor in the stern and of constructing its fly-wheel of asuitable diameter without giving an excessive inclina-.

tion to the shaft 3' and leaving all the space in the bow of theboatfree and unoccupied. In 7 addition, the motor bein close to therudder, the maneuvering of the oat is much simplified. One can furtherarrange above the support or bracket 6 a seat Z, which conceals a partof the mechanism.

In the mechanism partially shown in Fig.

2 the arrangements of a universal joint between the shafts d and j areavoided, and the shaft (1 transmits the ower by means of a pinion f,slightly conica to another pinion g, also slightly conical, mounteddirect on the shaft j.

In the form shown in Fig. 3 the shaft (1 also carries a conical pinionf; but it gears with an annular wheel g, mounted on the shaft j.

In Fig. 4. the shaft d carries a pinion f, which transmits the movementby a joint m to a toothed wheel g, mounted on the shaft h,

which is; connected to the shaft j of the screw by a universal joint 01,as in the form shown in Fig. 1. An arrangement similar to this would bespecially suitable for a twin-screw boat in the case of a shallow draftof water. In this case it would only be necessary to mount, one near theother, on the extremity of the shaft d two pinions, such as f, which bytwo separate chains or by direct gearing would transmit the movement totwo wheels, such as g, mounted on the two shafts of the screws.

- In Fig. 5 the change-speed mechanism 1) is I arranged toward the frontof the shaft d and acts directly on a pinion f, gearing with the wheelg, the shaft of which is connected by a universal joint with the shaft jof the screw.

Having now particularly described and as certained the natureof my saidinvention and in what manner the same is to be performed, I declare thatwhat I claim is- 1. A driving-gear for boats comprising a motor locatedat the stern, a driving-shaft extending forwardly from said motor in ahorizontal plane, a propeller located forwardly of the stern and belowthe keel of the boat, a propeller-shaft inclined with respect to themotor-shaft and extending from the propeller through the bottom of thehull and forwardly therein to a point adjacent the front end of saidmotor-shaft, conical pinions for said motor and propeller-shafts, andbearings for said shafts spaced apart from said pinions to permit theemployment of pinions of difierent size to vary the speed of saidpropeller. v

2. A driving-gear for boats, comprising in combination a motor locatedadjacent the stern of the boat, a driving-shaft extending forwardly fromsaid motor, a propeller, a propeller-shaft inclined with respect to themotor-shaft and extending forwardly to a point adjacent the end of themotor-shaft, means operatively connecting said shafts, and bearings forsaid shafts located on opposite sides of said means and spaced aparttherefrom to permit adjustment of said means to vary the speed of saidpropeller.

3. A'driving-gear for boats, comprisingin combination a motor locatedadjacent the stern of the boat, a driving-shaft extending forwardly fromsaid motor, a propeller, a propeller-shaft inclined with respect to themotor-shaft and extending forwardly to a point adjacent the end of themotor-shaft, means operatively connecting said shafts, a bearingstandardprovided with uprights located on opposite sides of said means andspaced apart therefrom, and independent bearings for said uprightsreceiving said motor and propellershafts on opposite sides of saidmeans.

4. A driving-gear for boats, comprising in combination a motor locatedadjacent the stern of the boat, a driving-shaft extending forwardly fromsaid motor, a propeller, a propeller-shaft inclined with respect to themotor-shaft and extending forwardly to a point adjacent the end of themotor-shaft, means operatively connecting said shafts a bearingstandardprovided with uprights located on opposite sides of said means andspaced apart therefrom, and independent bearings for said uprightsreceiving said motor and propellershafts on opposite sides of saidmeans, said uprights being provided with inclllined ways for thebearings of said propellers aft.

In testimony whereof I have affixed my signature in presence of twosubscribing witnesses.

HENRI CHARLES BRASIER.

Witnesses HENRI VIGNAUD, JULIUS OAsENovA.

